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Old 10-22-2019, 11:08 AM   #1
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Toyo load inflation table question

I'm sure most of you in this subforum are well aware of inflating your tires according to your tire manufacturer's load inflation table for your rig's actual axle weights, rather than the max on the sidewall, what's listed somewhere inside your rig (b/c that could be outdated, tire size & construction could be different, etc), or what some tech at some shop set them at (usually overinflated).

Anywho, based on the above, I'm a little confused by Toyo's table for our tire on our new to us coach. There are two rows for the same size tire, and no indication what differs. Anyone know?

Thank you.
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Old 10-22-2019, 11:12 AM   #2
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Could be that they manufacture two different tires of the same size with different weight/ply ratings, but usually this would be identified in the table.


Have not run Toyo's, but plenty do and they will no doubt chime in.
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Old 10-22-2019, 11:15 AM   #3
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I believe one is for G load ratings and one for H.
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Old 10-22-2019, 11:23 AM   #4
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Quote:
Originally Posted by FormerBoater View Post
Could be that they manufacture two different tires of the same size with different weight/ply ratings, but usually this would be identified in the table.


Have not run Toyo's, but plenty do and they will no doubt chime in.
That's what I was thinking, but they don't identify, except for an asterisk instance that is ironically for our size tire...but not our tire, lol (ours are M144).
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Old 10-22-2019, 11:26 AM   #5
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Quote:
Originally Posted by Deep Water D View Post
I believe one is for G load ratings and one for H.
In our case, I don't think so, because both listed are L rated. Of course Toyo's website is acting wonky, at the moment
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Old 10-22-2019, 11:44 AM   #6
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Yeah, my mistake about the actual letters; my point was that the different lines are for different load ratings.
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In our case, I don't think so, because both listed are L rated. Of course Toyo's website is acting wonky, at the moment
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Old 10-22-2019, 12:02 PM   #7
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Can be that one tire is for 10kmph/6.3mph.
Lower speed given in maxload, so for instance
N ( 140kmph/87mph)speedrated and the higher maxload M ( 130kmph/81mph) speedrated.

Both are loadrange L , so probably 130 psi as highest pressure given in the list, with that maxload as loadcapacity given. Your picture dont give the psi above the loadcapacity's.
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Old 10-22-2019, 12:06 PM   #8
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Can be that one tire is for 10kmph/6.3mph.
Lower speed given in maxload, so for instance
N ( 140kmph/87mph)speedrated and the higher maxload M ( 130kmph/81mph) speedrated.

Both are loadrange L , so probably 130 psi as highest pressure given in the list, with that maxload as loadcapacity given. Your picture dont give the psi above the loadcapacity's.
Yes, both listed (both rows on my attached screenshot) are load range L, hence my confusion. The linked webpage is the entire table with psi.
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Old 10-22-2019, 01:32 PM   #9
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It must be as I mentioned.
In Europe, where I live( the Netherlands) , on trucktires almost always an aditional servicedescriptions are given. Your given list is for single load 157 and 158 loadindex.
About 2 monts ago I made picture of a goodyear trucktire and put a yellow line under the service description 156 L ( for 120kmph/75mph) ana behind that 154M ( for 81mph/130kmph).
Same tire so only speed determines the maxload.
Duall load for some reason is the same 150 loadindex.
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Old 10-22-2019, 02:18 PM   #10
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I now see the same sise as yours.
Why European tire 156/154 loadindex , and USA 158/157 loadindex, must be because Americans think bigger, and Europeans are more carefull.
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Old 10-22-2019, 02:33 PM   #11
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The lower weight rating lines may be for this tire mounted on a 8 1/4" wide rim.

No fine print under the chart?
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Old 10-22-2019, 08:21 PM   #12
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There are actually 3 lines for the 315/80 size, one for the M320Z model and the other two not identified.

https://www.toyotires.com/media/2155...ion_tables.pdf


I've seen a similar thing in the Michelin tables but there was always a footnote explaining when to apply which set of psi values. The one I saw was a difference in production date - the tire was redesigned and the psi values changed.
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Old 10-22-2019, 09:33 PM   #13
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Quote:
Originally Posted by Gary RVRoamer View Post
There are actually 3 lines for the 315/80 size, one for the M320Z model and the other two not identified.

https://www.toyotires.com/media/2155...ion_tables.pdf


I've seen a similar thing in the Michelin tables but there was always a footnote explaining when to apply which set of psi values. The one I saw was a difference in production date - the tire was redesigned and the psi values changed.
Yeah, you'd think they'd explain it somewhere. Maybe I just don't know where to look...sure doesn't seem to be on the inflation table! I suppose I could call someone at Toyo & see what info I can get.
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Old 10-23-2019, 01:15 AM   #14
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Yes, call Toyo 1-800-442-8696
They may ask you if there are any other markings on the tire.
They have standard, reinforced and extra load categories, but that chart definitely needs clarification.

I did find this Toyo RV Tire inflation chart if it's of any help
http://www.dmbruss.com/images/FullTi...ion_tables.pdf
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